The first financial and financial fintech summit 2019 was held in Beijing on December 1. During the peak dialogue session on the topic "Blockchain and Digital Currency", Guo Weimin, chief scientist of Bank of China, believed that Bitcoin was very successful in the field of yellow gambling, but was not successful in other areas. Bitcoin itself is a scam, not a currency at all, and there is no problem of inflation and deflation. Compared to traditional financial institutions, there is no problem of cost comparison. In addition, blockchain technology is a very inefficient technology.